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Delta Hit So Hard Because Too Few Young Adults Were Vaccinated

The surge caused by the delta variant wasn’t only due to unvaccinated younger adults, but they played a substantial role

Photo: Mufid Majnun/Unsplash

When the delta variant reached the U.S. and caused another huge surge of infections, a key question arose: Is delta more virulent — does it cause more severe…

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Tara Haelle

Tara Haelle

Tara Haelle is a science journalist, public speaker, and author of Vaccination Investigation and The Informed Parent. Follow her at @tarahaelle.